Drinking straw attachment



FIG. 1 is a perspective view of a drinking straw attachment, illustrating our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is a perspective view of the drinking straw attachment illustrated with environmental structure; and,

FIG. 7 is a perspective view of a drinking straw attachment illustrated with environmental structure.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a drinking straw attachment, as shown and described. 